Solo queue M+
New Classes
New Specs
Total Addon Death
10 man Mythic raiding
Jailor revived
More Xal'atath feet
Talent Tree Revamps

That is all

>watching mazed rats scream in agony the last week of title grind
>watching mythic raiding guilds having literally nothing to do for 4 months and being forced to raid each week
>watching everyone playing pandaria while 11.2 raid tests couldn't happen because the servers crashed